package com.luozongyao.eduService.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.luozongyao.eduService.entity.EduSubject;
import com.luozongyao.eduService.entity.excel.SubjectData;
import com.luozongyao.eduService.service.EduSubjectService;
import com.luozongyao.servicebase.config.exceptionHandler.lzyException;

/**
 * @program: guli_parent
 * @description:
 * @author: Zongyao Luo
 * @create: 2021-08-10 23:27
 **/
public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {


    //因为SubjectExcelListener不能交给spring进行管理，
    // 需要自己new，不能注入其他对象
    // 不能实现数据库操作
    public EduSubjectService subjectService;

    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }
    public SubjectExcelListener() { }




    @Override //一行行内容读取
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if(subjectData==null){
            throw new lzyException(20001,"文件数据为空");
        }
        //判断一级分类是否重复
        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if (existOneSubject == null){  //表示没有相同的一级分类,进行添加
            existOneSubject = new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);
        }
        //获取一级分类的ID值
        //判断二级分类是否重复
        String pid = existOneSubject.getId();
        EduSubject existTwoSubject = this.existTwoSubject(subjectService, subjectData.getTwoSubjectName(), pid);
        if (existTwoSubject == null){  //表示没有相同的一级分类,进行添加
            existTwoSubject = new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existTwoSubject);
        }

    }

    //判断是否是一级分类 不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","0");
        EduSubject oneSubject = subjectService.getOne(wrapper);
        return oneSubject;
    }
    //判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject;
    }



    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
